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- // SPDX-License-Identifier: GPL-2.0+
- // Copyright 2018-2021 NXP
- #include <linux/clk.h>
- #include <linux/clk-provider.h>
- #include <linux/delay.h>
- #include <linux/dmaengine.h>
- #include <linux/module.h>
- #include <linux/of_device.h>
- #include <linux/of_address.h>
- #include <linux/pm_runtime.h>
- #include <linux/rpmsg.h>
- #include <linux/slab.h>
- #include <sound/core.h>
- #include <sound/dmaengine_pcm.h>
- #include <sound/pcm_params.h>
- #include "fsl_rpmsg.h"
- #include "imx-pcm.h"
- #define FSL_RPMSG_RATES (SNDRV_PCM_RATE_8000 | \
- SNDRV_PCM_RATE_16000 | \
- SNDRV_PCM_RATE_48000)
- #define FSL_RPMSG_FORMATS SNDRV_PCM_FMTBIT_S16_LE
- /* 192kHz/32bit/2ch/60s size is 0x574e00 */
- #define LPA_LARGE_BUFFER_SIZE (0x6000000)
- static const unsigned int fsl_rpmsg_rates[] = {
- 8000, 11025, 16000, 22050, 44100,
- 32000, 48000, 96000, 88200, 176400, 192000,
- 352800, 384000, 705600, 768000, 1411200, 2822400,
- };
- static const struct snd_pcm_hw_constraint_list fsl_rpmsg_rate_constraints = {
- .count = ARRAY_SIZE(fsl_rpmsg_rates),
- .list = fsl_rpmsg_rates,
- };
- static int fsl_rpmsg_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params,
- struct snd_soc_dai *dai)
- {
- struct fsl_rpmsg *rpmsg = snd_soc_dai_get_drvdata(dai);
- struct clk *p = rpmsg->mclk, *pll = NULL, *npll = NULL;
- u64 rate = params_rate(params);
- int ret = 0;
- /* Get current pll parent */
- while (p && rpmsg->pll8k && rpmsg->pll11k) {
- struct clk *pp = clk_get_parent(p);
- if (clk_is_match(pp, rpmsg->pll8k) ||
- clk_is_match(pp, rpmsg->pll11k)) {
- pll = pp;
- break;
- }
- p = pp;
- }
- /* Switch to another pll parent if needed. */
- if (pll) {
- npll = (do_div(rate, 8000) ? rpmsg->pll11k : rpmsg->pll8k);
- if (!clk_is_match(pll, npll)) {
- ret = clk_set_parent(p, npll);
- if (ret < 0)
- dev_warn(dai->dev, "failed to set parent %s: %d\n",
- __clk_get_name(npll), ret);
- }
- }
- if (!(rpmsg->mclk_streams & BIT(substream->stream))) {
- ret = clk_prepare_enable(rpmsg->mclk);
- if (ret) {
- dev_err(dai->dev, "failed to enable mclk: %d\n", ret);
- return ret;
- }
- rpmsg->mclk_streams |= BIT(substream->stream);
- }
- return ret;
- }
- static int fsl_rpmsg_hw_free(struct snd_pcm_substream *substream,
- struct snd_soc_dai *dai)
- {
- struct fsl_rpmsg *rpmsg = snd_soc_dai_get_drvdata(dai);
- if (rpmsg->mclk_streams & BIT(substream->stream)) {
- clk_disable_unprepare(rpmsg->mclk);
- rpmsg->mclk_streams &= ~BIT(substream->stream);
- }
- return 0;
- }
- static int fsl_rpmsg_startup(struct snd_pcm_substream *substream,
- struct snd_soc_dai *cpu_dai)
- {
- int ret;
- ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
- SNDRV_PCM_HW_PARAM_RATE,
- &fsl_rpmsg_rate_constraints);
- return ret;
- }
- static const struct snd_soc_dai_ops fsl_rpmsg_dai_ops = {
- .startup = fsl_rpmsg_startup,
- .hw_params = fsl_rpmsg_hw_params,
- .hw_free = fsl_rpmsg_hw_free,
- };
- static struct snd_soc_dai_driver fsl_rpmsg_dai = {
- .playback = {
- .stream_name = "CPU-Playback",
- .channels_min = 2,
- .channels_max = 2,
- .rates = SNDRV_PCM_RATE_KNOT,
- .formats = FSL_RPMSG_FORMATS,
- },
- .capture = {
- .stream_name = "CPU-Capture",
- .channels_min = 2,
- .channels_max = 2,
- .rates = SNDRV_PCM_RATE_KNOT,
- .formats = FSL_RPMSG_FORMATS,
- },
- .symmetric_rate = 1,
- .symmetric_channels = 1,
- .symmetric_sample_bits = 1,
- .ops = &fsl_rpmsg_dai_ops,
- };
- static const struct snd_soc_component_driver fsl_component = {
- .name = "fsl-rpmsg",
- .legacy_dai_naming = 1,
- };
- static const struct fsl_rpmsg_soc_data imx7ulp_data = {
- .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |
- SNDRV_PCM_RATE_48000,
- .formats = SNDRV_PCM_FMTBIT_S16_LE,
- };
- static const struct fsl_rpmsg_soc_data imx8mm_data = {
- .rates = SNDRV_PCM_RATE_KNOT,
- .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
- SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_DSD_U8 |
- SNDRV_PCM_FMTBIT_DSD_U16_LE | SNDRV_PCM_FMTBIT_DSD_U32_LE,
- };
- static const struct fsl_rpmsg_soc_data imx8mn_data = {
- .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
- SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
- SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
- SNDRV_PCM_RATE_192000,
- .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
- SNDRV_PCM_FMTBIT_S32_LE,
- };
- static const struct fsl_rpmsg_soc_data imx8mp_data = {
- .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
- SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
- SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
- SNDRV_PCM_RATE_192000,
- .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
- SNDRV_PCM_FMTBIT_S32_LE,
- };
- static const struct of_device_id fsl_rpmsg_ids[] = {
- { .compatible = "fsl,imx7ulp-rpmsg-audio", .data = &imx7ulp_data},
- { .compatible = "fsl,imx8mm-rpmsg-audio", .data = &imx8mm_data},
- { .compatible = "fsl,imx8mn-rpmsg-audio", .data = &imx8mn_data},
- { .compatible = "fsl,imx8mp-rpmsg-audio", .data = &imx8mp_data},
- { .compatible = "fsl,imx8ulp-rpmsg-audio", .data = &imx7ulp_data},
- { /* sentinel */ }
- };
- MODULE_DEVICE_TABLE(of, fsl_rpmsg_ids);
- static int fsl_rpmsg_probe(struct platform_device *pdev)
- {
- struct device_node *np = pdev->dev.of_node;
- struct fsl_rpmsg *rpmsg;
- int ret;
- rpmsg = devm_kzalloc(&pdev->dev, sizeof(struct fsl_rpmsg), GFP_KERNEL);
- if (!rpmsg)
- return -ENOMEM;
- rpmsg->soc_data = of_device_get_match_data(&pdev->dev);
- fsl_rpmsg_dai.playback.rates = rpmsg->soc_data->rates;
- fsl_rpmsg_dai.capture.rates = rpmsg->soc_data->rates;
- fsl_rpmsg_dai.playback.formats = rpmsg->soc_data->formats;
- fsl_rpmsg_dai.capture.formats = rpmsg->soc_data->formats;
- if (of_property_read_bool(np, "fsl,enable-lpa")) {
- rpmsg->enable_lpa = 1;
- rpmsg->buffer_size = LPA_LARGE_BUFFER_SIZE;
- } else {
- rpmsg->buffer_size = IMX_DEFAULT_DMABUF_SIZE;
- }
- /* Get the optional clocks */
- rpmsg->ipg = devm_clk_get_optional(&pdev->dev, "ipg");
- if (IS_ERR(rpmsg->ipg))
- return PTR_ERR(rpmsg->ipg);
- rpmsg->mclk = devm_clk_get_optional(&pdev->dev, "mclk");
- if (IS_ERR(rpmsg->mclk))
- return PTR_ERR(rpmsg->mclk);
- rpmsg->dma = devm_clk_get_optional(&pdev->dev, "dma");
- if (IS_ERR(rpmsg->dma))
- return PTR_ERR(rpmsg->dma);
- rpmsg->pll8k = devm_clk_get_optional(&pdev->dev, "pll8k");
- if (IS_ERR(rpmsg->pll8k))
- return PTR_ERR(rpmsg->pll8k);
- rpmsg->pll11k = devm_clk_get_optional(&pdev->dev, "pll11k");
- if (IS_ERR(rpmsg->pll11k))
- return PTR_ERR(rpmsg->pll11k);
- platform_set_drvdata(pdev, rpmsg);
- pm_runtime_enable(&pdev->dev);
- ret = devm_snd_soc_register_component(&pdev->dev, &fsl_component,
- &fsl_rpmsg_dai, 1);
- if (ret)
- return ret;
- rpmsg->card_pdev = platform_device_register_data(&pdev->dev,
- "imx-audio-rpmsg",
- PLATFORM_DEVID_NONE,
- NULL,
- 0);
- if (IS_ERR(rpmsg->card_pdev)) {
- dev_err(&pdev->dev, "failed to register rpmsg card\n");
- ret = PTR_ERR(rpmsg->card_pdev);
- return ret;
- }
- return 0;
- }
- static int fsl_rpmsg_remove(struct platform_device *pdev)
- {
- struct fsl_rpmsg *rpmsg = platform_get_drvdata(pdev);
- if (rpmsg->card_pdev)
- platform_device_unregister(rpmsg->card_pdev);
- return 0;
- }
- #ifdef CONFIG_PM
- static int fsl_rpmsg_runtime_resume(struct device *dev)
- {
- struct fsl_rpmsg *rpmsg = dev_get_drvdata(dev);
- int ret;
- ret = clk_prepare_enable(rpmsg->ipg);
- if (ret) {
- dev_err(dev, "failed to enable ipg clock: %d\n", ret);
- goto ipg_err;
- }
- ret = clk_prepare_enable(rpmsg->dma);
- if (ret) {
- dev_err(dev, "Failed to enable dma clock %d\n", ret);
- goto dma_err;
- }
- return 0;
- dma_err:
- clk_disable_unprepare(rpmsg->ipg);
- ipg_err:
- return ret;
- }
- static int fsl_rpmsg_runtime_suspend(struct device *dev)
- {
- struct fsl_rpmsg *rpmsg = dev_get_drvdata(dev);
- clk_disable_unprepare(rpmsg->dma);
- clk_disable_unprepare(rpmsg->ipg);
- return 0;
- }
- #endif
- static const struct dev_pm_ops fsl_rpmsg_pm_ops = {
- SET_RUNTIME_PM_OPS(fsl_rpmsg_runtime_suspend,
- fsl_rpmsg_runtime_resume,
- NULL)
- };
- static struct platform_driver fsl_rpmsg_driver = {
- .probe = fsl_rpmsg_probe,
- .remove = fsl_rpmsg_remove,
- .driver = {
- .name = "fsl_rpmsg",
- .pm = &fsl_rpmsg_pm_ops,
- .of_match_table = fsl_rpmsg_ids,
- },
- };
- module_platform_driver(fsl_rpmsg_driver);
- MODULE_DESCRIPTION("Freescale SoC Audio PRMSG CPU Interface");
- MODULE_AUTHOR("Shengjiu Wang <[email protected]>");
- MODULE_ALIAS("platform:fsl_rpmsg");
- MODULE_LICENSE("GPL");
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